If you're a smart head coach or general manager, then for the last five weeks, since the NFL draft reached its conclusion, you've been studying or, at the very least, pondering your next move. Because your're not finished trying to find the next crop of talent for your franchise.

Typically, the draft comes to an end, and almost instantly it triggers the run on undrafted free agents. This year, teams have had time to think it over, with the lockout putting business as usual on hold. The goal is still the same, though: You hope to find yourself the next Kurt Warner, or the next Warren Moon, or the next John Randle.

When you make big plays like that, you get noticed, as you'll find that Williams is now included in my list of the 100 greatest undrafted free agents of all time.

1. Kurt Warner, QB, Northern Iowa Signed by: St. Louis Rams First year: 1998 NFL seasons: 12Pro Bowls: 4 All-Pro selections: 2 Notes: In addition to being perhaps the greatest Cinderella story in NFL history, Warner is a two-time league MVP who has posted the three best passing yardage totals in Super Bowl history.

3. Emlen Tunnell, DB, Iowa Signed by: New York Giants First year: 1948 NFL seasons: 14Pro Bowls: N/A All-Pro selections: N/A Notes: One of the great defensive backs in NFL history, second on the all-time list with 79 interceptions.

Whether overlooked or from tiny schools -- such as "Night Train" Lane from Scottsbluff (Neb.) Junior College -- these players rose from obscurity to become NFL greats.
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7. Joe Perry, RB, Compton (Calif.) Community College Signed by: San Francisco 49ers First year: 1948 NFL seasons: 14Pro Bowls: 3 All-Pro selections: 2 Notes: One of the most explosive inside runners in NFL history. Hall of Famer led NFL in rushing two seasons.

8. Lou (The Toe) Groza, OT/PK, Ohio State Signed by: Cleveland Browns First year: 1946 NFL seasons: 21Pro Bowls: 9 All-Pro selections: 4 Notes: Groza doubled as an offensive tackle and kicker for 14 years on Cleveland's championship teams of the 1950s before becoming a kicking specialist in 1961 ... Hall of Famer played until he was 43 years old.

9. Cliff Harris, S, Ouachita Baptist Signed by: Dallas Cowboys First year: 1970 NFL seasons: 10Pro Bowls: 6 All-Pro selections: 3 Notes: One of the Cowboys' greatest success stories. Nickname was "Crash," and he was as tough as they come.

15. Brian Waters, C/G, North Texas Signed by: Kansas City Chiefs NFL seasons: 11 First year: 2000Pro Bowls: 5 All-Pro selections: 2 Notes: Played tight end in college and became one of the best interior linemen in NFL history.

20. Adam Vinatieri, PK, South Dakota State Signed by: New England Patriots NFL seasons: 15 (active) First year: 1996Pro Bowls: 2 All-Pro selections: 2 Notes: Four Super Bowl rings -- and the game-winning field goal in two of those championships -- to go along with 364 career field goals.